Enable bodyclose linter (#36168)

Enabe
[`bodyclose`](https://golangci-lint.run/docs/linters/configuration/#bodyclose).
The only issue in non-test code (`services/migrations/dump.go`) was a
false-positive and I think there are a number of undetected cases, but I
guess it's still better than not having it.

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

services/migrations/dump.go

@@ -306,14 +306,15 @@ func (g *RepositoryDumper) CreateReleases(_ context.Context, releases ...*base.R
 						if err != nil {
 							return err
 						}
+						defer rc.Close()
 					} else {
 						resp, err := http.Get(*asset.DownloadURL)
 						if err != nil {
 							return err
 						}
+						defer resp.Body.Close()
 						rc = resp.Body
 					}
-					defer rc.Close()
 
 					fw, err := os.Create(attachPath)
 					if err != nil {

services/migrations/gitea_downloader_test.go

@@ -27,6 +27,7 @@ func TestGiteaDownloadRepo(t *testing.T) {
 	if err != nil || resp.StatusCode != http.StatusOK {
 		t.Skipf("Can't reach https://gitea.com, skipping %s", t.Name())
 	}
+	defer resp.Body.Close()
 	ctx := t.Context()
 	downloader, err := NewGiteaDownloader(ctx, "https://gitea.com", "gitea/test_repo", "", "", giteaToken)
 	require.NoError(t, err, "NewGiteaDownloader error occur")

services/migrations/gitlab_test.go

@@ -30,6 +30,7 @@ func TestGitlabDownloadRepo(t *testing.T) {
 	if err != nil || resp.StatusCode != http.StatusOK {
 		t.Skipf("Can't access test repo, skipping %s", t.Name())
 	}
+	defer resp.Body.Close()
 	ctx := t.Context()
 	downloader, err := NewGitlabDownloader(ctx, "https://gitlab.com", "gitea/test_repo", gitlabPersonalAccessToken)
 	if err != nil {

services/migrations/gogs_test.go

@@ -27,6 +27,7 @@ func TestGogsDownloadRepo(t *testing.T) {
 		t.Skipf("visit test repo failed, ignored")
 		return
 	}
+	defer resp.Body.Close()
 	ctx := t.Context()
 	downloader := NewGogsDownloader(ctx, "https://try.gogs.io", "", "", gogsPersonalAccessToken, "lunnytest", "TESTREPO")
 	repo, err := downloader.GetRepoInfo(ctx)

services/migrations/onedev_test.go

@@ -19,6 +19,7 @@ func TestOneDevDownloadRepo(t *testing.T) {
 	if err != nil || resp.StatusCode != http.StatusOK {
 		t.Skipf("Can't access test repo, skipping %s", t.Name())
 	}
+	defer resp.Body.Close()
 
 	u, _ := url.Parse("https://code.onedev.io")
 	ctx := t.Context()